<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="../node_modules/d3/dist/d3.js"></script>
<script src="../node_modules/@hpcc-js/wasm/dist/graphviz.umd.js" type="javascript/worker"></script>
<script src="../build/d3-graphviz.js"></script>
<div id="graph" style="text-align: center;"></div>
<script>

var dotIndex = 0;
var graphviz = d3.select("#graph").graphviz()
    .transition(function () {
        return d3.transition()
            .ease(d3.easeLinear)
            .delay(1000)
            .duration(1500);
    })
    .logEvents(true)
    .on("initEnd", render);

function attributer(datum, index, nodes) {
    var selection = d3.select(this);
    if (datum.tag == "svg") {
        var width = "600";
        var height = "400";
        var x = "10";
        var y = "10";
        selection
            .attr("width", width + "pt")
            .attr("height", height + "pt")
            .attr("viewBox", -x + " " + -y + " " + width + " " + height);
        datum.attributes.width = width + "pt";
        datum.attributes.height = height + "pt";
        datum.attributes.viewBox = -x + " " + -y + " " + width + " " + height;
    }
}

function render() {
    var dotLines = dots[dotIndex % dots.length];
    var dot = dotLines.join('');
    graphviz
//        .tweenPaths(false)
        .tweenShapes(false)
        .dot(dot)
        .attributer(attributer)
        .render()
        .on('end', function () {
            if (dotIndex != dots.length) {
                render();
            }
        });
    dotIndex += 1;
}

var dots = [
    [
        'digraph  {',
        '    node [style="filled"]',
        '    edge [tooltip="Edge \\\\E" URL="Link \\\E"]',
        '    a [fillcolor="#d62728"]',
        '    b [fillcolor="#1f77b4"]',
        '    c [fillcolor="#2ca02c"]',
        '    a -> b',
        '    b -> c',
        '}'
    ],
    [
        'digraph  {',
        '    node [style="filled"]',
        '    edge [tooltip="Edge \\\\E" URL="Link \\\E"]',
        '    a [fillcolor="#d62728"]',
        '    b [fillcolor="#1f77b4"]',
        '    c [fillcolor="#2ca02c"]',
        '    a -> b',
        '    b -> c',
        '    a -> c',
        '}'
    ],
];

</script>
